Methane detection scheme based upon the changing optical constants of a zinc oxide/platinum matrix created by a redox reaction and their effect upon surface plasmons

Allsop, Thomas, Kundrat, Vojtěch, Kalli, Kyriacos, Lee, Graham B., Neal, Ron, Bond, Peter, Shi, Baogul, Sullivan, John, Culverhouse, Phil and Webb, David J. (2018). Methane detection scheme based upon the changing optical constants of a zinc oxide/platinum matrix created by a redox reaction and their effect upon surface plasmons. Sensors and Actuators, B: Chemical, 255 (1),

Abstract

We detect changes in the optical properties of a metal oxide semiconductor (MOS), ZnO, in a multi-thin-film matrix with platinum in the presence of the hydrocarbon gas methane. A limit of detection of 2% by volume with concentrations from 0 to 10% and maximum resolution of 0.15% with concentrations ranging from 30% to 80% at room temperature are demonstrated along with a selective chemical response to methane over carbon dioxide and the other alkane gases. The device yields the equivalent maximum bulk refractive index spectral sensitivity of 1.8 × 105 nm/RIU. This is the first time that the optical properties of MOS have been monitored to detect the presence of a specific gas. This single observation is a significant result, as MOS have a potentially large number of target gases, thus offering a new paradigm for gas sensing using MOSs.

Publication DOI: https://doi.org/10.1016/j.snb.2017.08.058
Dataset DOI: https://doi.org/10.17036/researchdata.aston.ac.uk.00000276
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences > Institute of Photonics
Additional Information: © 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funding: Grants EP/J010413 and EP/J010391 for Aston University and University of Plymouth from the UK Engineering and Physical Sciences Research Council.
Uncontrolled Keywords: localized surface plasmons,metal oxide semiconductors,optical sensing,gas sensing,fibre optics
Full Text Link: https://www.sciencedirect.com/science/article/pii/S0925400517314806
Related URLs:
Published Date: 2018-02-01
Authors: Allsop, Thomas
Kundrat, Vojtěch
Kalli, Kyriacos
Lee, Graham B.
Neal, Ron
Bond, Peter
Shi, Baogul
Sullivan, John
Culverhouse, Phil
Webb, David J. ( 0000-0002-5495-1296)

Download

[img]

Version: Published Version

License: Creative Commons Attribution

| Preview

Export / Share Citation


Statistics

Additional statistics for this record